package com.qk.interceptor;

import com.qk.common.utils.CurrentUserHoler;
import com.qk.common.utils.JwtUtils;
import io.jsonwebtoken.Claims;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

@Slf4j
@Component
public class TokenInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //1.获取请求路径
        String uri = request.getRequestURI();
        //2.判断请求路径是否为登录接口
        if (uri.contains("login")) {
            log.info("登录成功 {}, 放行", uri);
            return true;
        }
        //3.获取token
        String jwt = request.getHeader("token");
        //4.判断token是否存在
        if (jwt == null || jwt.isEmpty()) {
            log.info("token不存在, 拦截");
            response.setStatus(401);
            return false;
        }
        //5.解析令牌
        try {
            Claims claims = JwtUtils.parseToken(jwt);
            Integer userId = claims.get("id", Integer.class);
            log.info("当前用户id,存入ThreadLocal");
            CurrentUserHoler.setCurrentUser(userId);

        } catch (Exception e) {
            log.info("令牌解析失败, 拦截");
            response.setStatus(401);
            return false;
        }

        //6.放行
        log.info("令牌解析成功, 放行");
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        //7.释放资源
        log.info("删除ThreadLocal中的登录用户信息");
        CurrentUserHoler.removeCurrentUser();
    }

}
